.course_nr{
    width: 1100px;
    height:158px;
    background:url(../img/1.png) repeat-x center;
    margin-left: 120px;
}
.course_nr li{
    float:left;
    background:url(../img/ico2.gif) no-repeat center top;
    padding-top:30px;
    width:140px;
    text-align:center;
    position:relative;
    margin-top:65px;

}
.shiji{
    position:absolute;
    width:100%;
    left:0;
    top:-20px;
    display:none;
}
.shiji h1{
    height:67px;
    line-height:67px;
    color:#518dbb;
    font-weight:bold;
    background:url(../img/ico3.gif) no-repeat center top;
    margin-bottom:8px;
}
.shiji p{
    line-height:14px;
    color:#999;
}
#backgroundpic{
    width: 1000px;
    height: 500px;
    margin-top: -38px;
    margin-left: auto;
    margin-right: auto;
    background-image:url(../img/ico2.gif);
}
